Shock absorber for paper carriages



Aug 24 1926. 1,597,482

F. c. RINSCHE SHOCK ABSORBER FOR PAPER CARRIAGES Filed Se t. 13 1923:z'sheets sheet 1 W3" Lx [N VENT KMA c A TTORNE Y8 Aug., 24 1926.-

F. C. RINSCHE SHOCK ABSORBER FOR PAPER CARRIAGES Filed Sept. 15 1923 2Sheets-Sheet 2 EC VVENT R M W ATTORNEYS ENT oFnc-E,

FRANK c. RINSGHE, or DETROIT, MIonrG-AN, ASSIGNOR'TO nuRnoUoHso-nnnmdMA- CHINE COMPANY, on nn'rnorr, ICHIGAN, A conrona'r onor MICHIGAN.

. SHOCK Aissonnnnrort PAPER oannmens;

. Application filed September-13,1923, Serial No. 662,447.

My invention relates to tabulating means orequipment for. addingmachines and the like, and more particularly to that type of machine inwhich the -papercarriage is propelled from one columnar positiontoanother under the impulse of a-momr, usually a spring motor.

The main objects of. my inventionare to provide a simple and improvedcushioning mechanism for absorbing the shock or relieving the force ofthe impact .of a tabulator dog or pawl on the paper" carriage against anarresting or stop member to employ a' cushioning device in the form ofanair dash-pot mounted on the papen carriage and having simple andQlfBOt-lVQCOIlIlBCtlOIlS to the tabulating stop mechanism on the papercarriage,"and to design the cushioning attachment so that it may bereadily applied to machines now on the market and in use withoutmaterially changingflthe; construc-' operationofits parts." i

aVvith the above and incidental objects in :vie'w','the inventionconsists in certain novel features of construction and combination ofparts, the essential elements whereof are recited in the appendedclaims, and a pretion of the machine or' interfering. with the fe'rredform of embodiment of. which is describediin detail hereinafter andillustrated in full in the accompanyingdrawings, which form part ofthisspecification.

" Of said drawings, F'g; 1"is 'arear elevation (foreshortened) of anadding machine,

with the attachment embodyin'g my invention applied and withthedash-potinsection to exposeits construction more clearly to view, the partsbeinpjshown in their n0r- .inal condition of-rest; Fig.--2fis asomewhatsimilar'viewjwith part of the paper. carriage broken away and most ofthe machine proper broken away, and showing the parts'in' the positionswhich they assume dur ngmove ment of the paper carriage from'onecolumnar position to another; Fig. 3"i's a de-,

tail lefthand end view, showing my attachmentapplied to the papercarriag "and Fig. 4 is atop" plan view of my'attachment.

with the dash-pot and the supportin'gend of the bracket in section. a

Forv the sake of illustration, I have shown 4 my invention 'applied tnthe well-known Bur roughs adding-machine, but it will be under stoodthat use of. the-invention is not'limited late or "panel,

back panel is thercustomary carriageftrack 7 upon which theshiftablepaper carriage,

designated generally "by the reference, num- "eral 8, is adapted totravel; Thepap'er'carmaze is shifted-fromleft to right (as viewed Figs.1 and 2,- that is from the rear) from one columnar position to another,under-ten- S1011 of a sprlng drum Qthrough its tape V10, whlch isfastened 'at'llto thecarriage frame The carriage may be moved in theopposite direction against' tension of the spring drum in any suitablemanner, but is her: shownas being returnable by hand, A

rock shaft 12 is mounted-in the carriage-to stops or dogs 13,- whichare. manually adjustable on the shaft in a manner well understood in'the m.- These stops 13 are adapted to cooperate or abut against ashoulde-r 15 on a stop bar 16, fast on the back.

panel 6.. "As is customary in the Burroughs adding machine, a slide bar17 is reciprocated vertically upon each operationof the machine throughsuitable connectionsto the main rock shaft of the machine, to elevate awith theshoulder 15 of the stop plate '16, to disengage the same andpermit the carnage to be moved to lts next or selected c'ostop liiagainst the shoulder 15. c I The,-,sha ftf12"in the present invention issuppprt the usual tabulator' or columnar.

pawl 18, which-coactswith the particular I columnar or .tabnlator stop1'3 in engagement slidably mounted-relatively to the carriage I vframeand is connected to the cushioning de- 1 vice, to

manner that afterthe shaft 12has been arrested by engagement of one ofits tabulator stopsl3-wi th the shoulder 1515f the stop plate 16; thecar-riageis permitted to move slightly further toward the right (Figs. 1

and 2), the cushioning" device being effective during this additionalmovement of the carriage to absorb the shock due tothe impact bedescribed presently, in sucha of the tabulator stop 13 on the shaft 12against. the stopplate '1-6' and-to gradually the lower arm' of a lever25, which is pivoted on a stud 26 (Fig. 3) projecting rearwardly from abracket 27 and 1s retained on the stud by the head ofa screw'.28.The.bracket 27 is supported on the right-hand end of the carriage,-thebracket being provided with two forwardly projecting lugs27 and onerearwardly pro ect1ng lug 27 provided with apertures through whichproject the outer threaded reduced ends of three collars or posts 31whichhave their opposite ends reduced and screw-threaded through theside .plate 22 of the carriage and into the casting of the carriage, thebracket being retained on the posts 31 by means of nuts 30 screwed ontothe outer ends of the-posts 31. The outer end of the bracket 27 is bentat right angles to form a rearwa'rdly extending arm,

27 provided with an aperture through which a threaded stud 32 on theclosed end of a dash-pot cylinder 33 projects, the cylinder beingretained on the arm by a nut 34 and washer 35. The upper end of thelever 25 is pivoted to one end of a link 36, theopposite end of which ispivoted 'to a forked bracket 37 mounted within and cured to the head ofa cup-shaped piston or plunger 38 of the dash- 0t. The head of thecylinder 33 is provide with a small hole 39, the passage of airtherethrough bein g regulated by an adjustable screw 40.- As' best shownin Fig. 3, the lower arm of the lever 25 is so bent or offset forwardlythat it is adapted to cooperate-with the arm 24 of the dog 23 and theupper end of the lever is offset rearwardly to accommodate itsconnection to the link 36; A spring 42 is con nected at one end to a pin43 on the lever 25 and at its opposite end tov a pin on the bracket 27.

From the above description, it will be obvious that when a colurnnardog:l 13 is disenga'ged from the shoulder 15 of t e stop plate 16,during an operation of the machine, the

spring drum 9 shifts the carriage toward the right, as viewed from therear, to its next or selected columnar position, being arrested in suchposition by engagement of the proper columnar stop 13 with the shoulder15 on the stop plate 16; When the columnar stop 13 is disengaged fromthe shoulder 15, the

1 spring 42, which is weaker or of lesser tension than the spring of thespring drurn 9,'

portions 20 of the shaft being slidably mounted in the side plates ofthecarriage frame. During the last increment of movement of the carriage toits next or predetermined-columnar position, under the in, finenee ofthe spring drum 9, the proper tabulator stop 13 engages the shoulder 15,whereupon further movement of the tabulator stop shaft 12 is arrested,but movement of the carriage towards the right, as viewed from the rear,is continued in opposition to the action of the spring 42 and thedash-pot. The-first effect or result of the impact of a tabulator stop13 with the shoulder 15 is to compress the air-in the dash-pot cylinder,

the piston being moved toward the right, but this does not result in anyrebound or recoil action of the carriage or of the movable cushioningparts, as the aperture-39 in the cylinder 33 is sufficiently large topermit the air .to escape from the cy inder,'thus counteracting oroffsetting any tendency of the piston to rebound or recoil. As the airis being compressed, it is gradually expelled through the aperture 39,thereby gradually slowing up the movement of the carriage and finallyarresting it in predetermined-position and thus eliminating any back andforth vibration of the carriage. The piston 38 contacts, without jar,withthe end of the cylinder of the dash-pot when the carriage reachesits exact predetermined position and at the same time the shoulder,comprising the right-hand sides of the grooves forming the reducedportions 20 of the tabulator stop shaft, engage the carriage plate 21and re taining latch 45 on the carriage plate 22.

As the tension of the spring 42 is les sthan that of the spring of thespring drum 9, it will be manifesttha-t the'carriage will be maintainedin its proper columnar position by the spring drum, and that when acolumnar stop 13-is rocked out of' engagement with the shoulder 15 onthestop plate 16, the spring 42 moves the piston 38,-1ever 25 and shaft.12 to the positions shown in Fig. 2. It will also'be clear that theadjustable screw 40, which carries a lock nut 41, is provided to controlthe rate at which the air is dispelledfrom the dash' pot, the spacebetween the end of the screw and the end of the aperture 39 beingincreased or decreased according to the extent of cushioning effectrequired.

' It will now be evident that my invention sorbs the initial shock dueto the impact of a tabulator stop against thestationary stop, andgradually, but without loss of time and unaccompaniedby any rebound orrecoil, brings the' carnage to its exact predeter-' mined position,while at the same time the mechanism is extremely simple, highlyefficient, practically noiseless, and .readily adapted to commercialmachines now on the market and in use. As above described, theattachment, comprising my invention is readily applied to one side ofthe paper carriage and the dash-pot piston is connected to the tabulatorstop shaft through simple connections, without necessitating any material change in the parts of the machine to accommodate the attachment.

It is to be understood that the embodiment of the invention described-issusceptible of various modifications without departure ,from'the scopeor spirit of the invention,

as, defined in the appended claims.

I claim;

'1. In a machine of the class described, the combination of a'frame, alaterally shiftable paper carriage on the frame, a shaft slidablymounted on said carriage,-a tabulator stop on said shaft, a stop on theframe adapted to be engaged '1 by said .tabulator stop, means forrocking said shaft to move said tabulator stop into and out of operativealignment with said stop on the frame, a dash-pot mounted on saidcarriage and having means for permitting the gradual:

release of the cushioning medium, and con nections between said daslrpotand said shaft whereby when the shaft is slid the dash-pot gradiiallyarrests the carriage during its final extent of movement to itspredetermined position. 2. In a machine of the class described, thecombination of a frame, a laterally shiftable paper carriage, a shaft onsaid carriage, a plurality of tabulator stops thereon, a stop on theframe adapted to coact with the stops on the carriage to arrest movementof the latter, means for operating said shaft to move the stops thereoninto and out of operative alignment with said stop on the fI&IIl,

a dash-pot comprising a cylinder and-a piston, one of which is mountedon the carriage, and connections. between the other elementofsaiddash-pot and said shaftand comprising a lever pivoted on thecarriage and engaging a member on the shaft togradually arrestthecarriage as it moves to its predetermined position.

S. In a machine of the class described,

the combination. of a frame, a laterally shiftable paper carriage, ashaft slidably mounted on said carriage, a plurality of tabulator stopson said shaft, a stop'on the frame adapted to coact with-said tabulatingstops, means for rockingthe shaft to move the stops thereon into and outof operative alignment with said stop on the carriage, .adash-poticomprising a cylinderand a p is 'ton, one of whichis"moun'ted"on the carriage, and a lever between the other element of,said dash-pot and said shaft whereby the dash-pot gradually arrests thecarriage as it moves to its predetermined position.

4. In a machine of the class described, he combination of a frame,alaterally shiftable paper carriage, a shafton said carriage, apluralityof tabulator stops on said shaft, a stop on the frame adaptedto be abutted by the stops on said-shaft to arrest movement of thecarriage, ineans for operating the shaft to move the-stops thereon intoand out of operative alignment-with the said stop on the frame, adash-pot com: 3

prising a cylinder and a piston, one of which is mounted on thecarriage, and connections between the other element of said dash-pot andsaid shaft constructed to cause the last a mentioned element of thedash-pot to move further than said carriage'while thelatter isbeingarrested in its predetermined position,

5. in a machine of combination of'a'frame, a laterally shiftable papercarriage, a shaft slidably mounted'on said carriage, a'plurality oftabulator stops on said shaft, a stop on the frame adapted to coact withthe stops on the carriage to I arrest movement of the; latter, means forthe class described,'the

rocking said shaft to move the stops there on into and out of operativealignment with said stop on the frame, adash-pot compr1sing a pistoninthe cylinder, one of which elements is mounted on the carriage, andconnections between the other element of the dash-pot and said shaftconstructed to cause paper carnage, tabulator stop mechanism ,saidlast-mentioned element of the dash-pot llO therefor comprisingcooperating parts, a

dash-pot, comprising a cylinder and p ton,

associated withisaid stop mechanism to act 'as a' cushion for thecarriage, one of said elements being fast on the carriage, and anoperating connection between the other element of said dash-pot and 6118of said parts of said tabulating stop mechanism, for cans-- ing saidlast-mentioned element of the dashpot to move further than saidpartwhile the carriageis being arrested. 3 I

'Z. In a machine of the class described, the combination of a frame, alaterally shiftable paper carriage thereon, a shaft on said carriageslidably mounted-thereon and having an extension projecting from oneside thereof, a part on said extension, a plurality of tabulator stopson said shaft, astop on the frame adapted to be engaged by the stops onsaid shaft to arrest movement of the carriage, means for rocking saidshaft to move the stops thereon into and out of operative alignment withsaid stop on the frame, a bracket secured to one side of said carriage,a dash-pot comprising a cylinder and 'a piston, one of which is fast tosaid bracket, a lever pivoted on said bracket and 10 secured to theother element of saiddashpot at one end and cooperatingat its oppositeend with said part on saidextension, and a spring for rocking said leverand sliding said shaft when the are disengaged.

FRANK o. RINSOHE.

cooperating stops 15

